10. Consider the following salts and choose the true statement:

(A) NiCO₃ has the greatest molar solubility.
(B) NiCO₃ has a greater solubilty in g/L than PbF₂.
(C) PbI₂ has a greater solubilty in g/L than NiCO₃.
(D) Addition of iodide to a solution of PbI₂ will result in a decrease of its .
(E) None of the above statements are true. 

6. What is the characteristic wavelength of an electron with a kinetic energy of 9.00 x J? (A) 444 nm (B) 369 pm (C) 590 pm (D) 16.4 pm (E) 0.198 pm

7. Which of the following statements is true? (A) Molecules containing polar bonds must be polar molecules. (B) Hydrogen bonding is generally stronger than ionic bonding. (C) London dispersion forces are only present between non-polar molecules. (D) Resonance structures of a molecule interchange in rapid, reversible, equilibrium (E) Liquid methanol (CH3OH) exhibits intermolecular hydrogen bonding interactions.

複選題8. Consider a vessel containing the following exothermic reaction at equilibrium: 2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g) Which changes would increase the amount of O2 (g) present? (A) Cooling the reaction (B) Doubling the volume of the reaction vessel (C) Adding SO2 (g) (D) Adding a catalyst (E) None of the previous answers.

9. Identify the orbital in the illustration:  (A) 3d (B) 3p (C) 4d (D) 4p (E) 5d

1. What is the bond angle between the two N,N-dimethyl groups of N,N-dimethylpropionamide? (A) 90° (B) 107° (C) 109.5° (D) 120° (E) 180°

2. Which of the following compounds possess the most acidic C-H bond (as highlighted). (Image of 5 compounds A-E)(A)(B)(C)(D)(E)

3. Determine the identity of the compound based on 13C NMR shown below. (Image of 13C NMR spectrum and 5 compounds A-E)(A) (B)(C)(D)(E)

4. Which of the following is a valid Fischer projection for D-(+)-xylose? (Image of D-(+)-xylose and 5 Fischer projections A-E)(A)(B)(C)(D)(E)

5. Which of the following Newman projections represents the lowest energy conformation of (S)-3-chloro-2,2-dimethylpentane? (Image of 5 Newman projections A-E)(A)(B)(C)(D)(E) 

Part II: Written Questions (Total: 40 points) Note: 6. The electron configuration of Mn is (A) [Ar]4s03d⁷ (B) [Ar]4s¹3d⁵ (C) [Ar]4s¹3d⁶ (D) [Ar]4s²3d⁵ (E) [Ar]4s²3d6